Feature original contour casting with the added detail of the stock intake and exhaust port areas. Heads are assembled with cast iron guides, valves stem seal, nitrated valves ( Intake valve 50 mm ) Panhead exhaust and Plumber style intake. Valve spring, upper spring collar, lower spring coller and valve keeper keys. Fully assembled set include Special made Rocker Block and rocker arm assembles, rocker arm studs and valve oilers installed. Brand is munufactured by Motortechnic Mfg.